Instantons in Partially Broken Gauge Groups

Details Instantons in Partially Broken Gauge Groups Instantons in Partially Broken Gauge Groups

1998-04-08

arxiv.org/abs/hep-th/9804061v1

Nucl.Phys.B532:498-526,1998

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, LaTeX, 3 figures included

Scientific paper

10.1016/S0550-3213(98)00448-9

We discuss the effects of instantons in partially broken gauge groups on the low-energy effective gauge theory. Such effects arise when some of the instantons of the original gauge group G are no longer contained in (or can not be gauge rotated into) the unbroken group H. In cases of simple G and H, a good indicator for the existence of such instantons is the ``index of embedding.'' However, in the general case one has to examine \pi_3(G/H) to decide whether there are any instantons in the broken part of the gauge group. We give several examples of supersymmetric theories where such instantons exist and leave their effects on the low-energy effective theory.

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